feat: Admin page that shows detours and allows an admin to delete them all

[joshlarson]

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Asana Ticket: https://app.asana.com/0/1205385723132845/1208226890774790/f

[github-actions]

Coverage of commit fcb66eb

Summary coverage rate:
  lines......: 92.6% (3317 of 3583 lines)
  functions..: 71.8% (1363 of 1899 functions)
  branches...: no data found

Files changed coverage rate:
                                                                  |Lines       |Functions  |Branches    
  Filename                                                        |Rate     Num|Rate    Num|Rate     Num
  ======================================================================================================
  lib/skate/detours/detours.ex                                    |82.4%     34|66.7%    18|    -      0
  lib/skate_web/controllers/detours_admin_controller.ex           | 0.0%     11| 0.0%     8|    -      0
  lib/skate_web/controllers/detours_admin_html.ex                 | 0.0%      1| 0.0%     4|    -      0
  lib/skate_web/router.ex                                         |86.6%     67|15.5%   142|    -      0

Download coverage report

[github-actions]

Coverage of commit 4f58a5f

Summary coverage rate:
  lines......: 92.6% (3318 of 3583 lines)
  functions..: 71.8% (1364 of 1899 functions)
  branches...: no data found

Files changed coverage rate:
                                                                  |Lines       |Functions  |Branches    
  Filename                                                        |Rate     Num|Rate    Num|Rate     Num
  ======================================================================================================
  lib/skate/detours/detours.ex                                    |82.4%     34|66.7%    18|    -      0
  lib/skate_web/controllers/detours_admin_controller.ex           | 0.0%     11| 0.0%     8|    -      0
  lib/skate_web/controllers/detours_admin_html.ex                 | 0.0%      1| 0.0%     4|    -      0
  lib/skate_web/router.ex                                         |86.6%     67|15.5%   142|    -      0

Download coverage report